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Changes in discharge rise and fall rates applied to impact assessment of catchment land use

机译：流量上升和下降率的变化应用于流域土地利用的影响评估

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Despite substantial evidence that land use and management can enhance flood runoff at a local scale, evidence of increased flood risk based on peak discharges is lacking in catchments greater than 10 km~2. This analysis is instead based on assessing changes in short-term rates of change in discharge. The influence of land use is demonstrated first on the small Coalburn catchment where changes in rates of rise are closely related to drainage and afforestation. For the larger Axe catchment (288 km~2), changes in rates of rise are investigated by comparing annual maximum and peaks over a threshold flows for different periods, by comparing rates of rise associated with given daily rainfall and by adapting the method of flow variability analysis for use of rates of change rather than flow itself. All these methods demonstrate significant changes in river flow dynamics which seem to be in parallel with land use changes even when the influence of climate variability from year to year has been taken into account. Rates of change in discharge appear to respond to land use changes and thus provide a potential basis for application to land use management policies.
机译：尽管有大量证据表明土地使用和管理可以在局部规模上增强洪水径流量，但在大于10 km〜2的流域中，缺乏基于洪峰流量增加洪水风险的证据。相反，该分析是基于评估短期排放变化率的变化。首先证明了土地使用的影响对小型Coalburn集水区的影响，那里增长率的变化与排水和绿化密切相关。对于较大的Ax集水区（288 km〜2），通过比较不同时期的年最大流量和阈值流量在不同时期的峰值，比较与给定每日降雨量相关的上升速率并采用流量方法来研究上升速率的变化。使用变化率而不是流量本身进行变异性分析。所有这些方法都表明，即使考虑了逐年的气候变化的影响，河流流量的动态变化似乎与土地利用变化平行。排放变化率似乎是对土地利用变化的反应，因此为应用土地利用管理政策提供了潜在的基础。

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